<div class="derry">
<div>
  这里是price组件
</div>
<div>
  股票代码是 {{ stockCode }}，股票价格是: {{ price | number: '2.2-2'}}
</div>
<div>
  <button type="button" (click)="buyStock($event)">立即购买</button>
</div>
</div>
